How to find out the number of sent emails from Postfix?

Question

postfix

Good afternoon. This is my first time with Postfix. There is a task (to remove the metric) about the number of sent letters per day. In general, the question is where to look, where to look for this metric?

Answer 1

There is no metric.
only in the log if you look. For example:
grep Queued ЛОГ_ФАЙЛ | wc -l
Well, according to the dates already themselves
Well, or collective farms, for example, like here:
https://www.lissyara.su/articles/freebsd/mail/post...